低碳混凝土的技术理念与途径思考

Technical Principles and Approaches for Low Carbon Concrete

从全球碳中和与可持续混凝土发展角度阐述了低碳混凝土的基本概念及全生命周期的减碳与碳汇核心技术理念.从原材料、混凝土设计、制备、施工、服役及再生利用等全生命周期过程提出了低碳混凝土的三大技术途径——直接减碳、间接减碳及碳汇技术,并分析了每个技术途径下的具体减碳技术路线.综述了混凝土的碳排放评价方法和准则,阐释了混凝土碳排放的生命周期评价方法 .提出了低碳混凝土未来的重点研究方向——开发新型胶凝材料以及碳汇技术.

From the perspective of global carbon neutrality and sustainable concrete development,the basic concept and the core technical principles of low-carbon concrete in the whole life cycle were stated.Three technical approaches for low-carbon concrete,including direct carbon reduction,indirect carbon reduction and carbon sink technology,were proposed in terms of raw materials,concrete design,preparation,construction,service and recycling throughout its whole life cycle.The specific routes of carbon reduction technology under each technology pathway were analyzed.The evaluation methods and criteria for carbon emissions of concrete were reviewed.Meanwhile,the life cycle assessment of carbon emission of concrete was explained.The key research directions of low-carbon concrete in the future were proposed,focusing on the development of new cementitious materials and carbon sink technology.